[MATTHEW] REMARKABLE FORMS OF THE LITTLE RIVER GROUP 117 



Length of headshield, 12 mm. Width, exclusive of genal spine, 23 

 mm. Pleura about 2 mm. wide and 10 mm. long. 



Horizon and Locality.— D'ààoxjlon sandstone at Duck Cove, Lan- 

 caster, N.B. Collected by A. G. Leavitt and Wm. Mcintosh. Found in 

 sandy and shaly layers, with plant-remains. 



The test of this crustacean is thin, and the cephalic shield is much 

 flattened by pressure, so that the outline of the glabella and the posterior 

 margin are only recognizable by crowded wrinkles ; those of the posterior 

 angle of the shield behind the glabella resemble the wrinkles around the 

 corresponding angle of the hypostome of certain Cambrian trilobites 

 {e.g. Paradoxides) . It is doubtful whether this species can be placed 

 under Belinurus or Prestwichia, it appears to belong to a new genus ; 

 the joints of the thorax in the example drawn seem to be soldered, but 

 free segments have been found; the peculiar intra-genal soft spine or 

 projecting flap of the headshield and the narrow axis of the thorax are 

 peculiar to this crustacean. 



INSECT A. 



iED^OPHASMA AcADiCA n. sp. Plate I, Fig. 1. 



The upper margin of this wing is not well preserved, and though 

 several nervules may be seen going out obliquely from the mediastinal 

 vein, a marginal vein cannot be make out. 



The mediastinal ( costal )i vein is nearly straight in its course, 

 except near the base where it curves upward abruptly from the scapular 

 and then with a gentle bend assumes a horizontal course. 



The scapular (radius) is a strong vein, direct in its course but 

 fades away toward the outer end. Near the end a strong branch 

 diverges downward toward the tip of the wing. It has a downward 

 curve at the base where the mediastinal vein curves upward, thus placing 

 a wider spare between these two veins toward thei base, than in their 

 outward extension. 



The externomedian (median) is also a strong vein, and beyond 

 the middle throws off several strong branches; the first of these by a 

 connecting branch unites with the second, and this again by a branch 

 which extends to the main vein, toward its outer end connects with the 

 latter: the externomedian curves down where it approaches the branch 

 of the scapular and becomes indistinct. 



A portion of an internomedian vein (cubitus) is faintly outlined 

 in the middle area of the wing, but below and in front of it the mar- 

 kings on the wing are faint and are obscured by one or more other wings 

 that overlie it. 



1 The notation of the main norves used here is that adopted by Scuddt^r. that 

 of C. Brongniart is in brackets. 



